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N. H. LINDLEY, OF BR IDGEPORT, CONNECTICUT.

Letters Patent No. 70,584, dated November 5, 1867.

IMPROVEMENT IN PROPAGATING-TANK ANDBED.

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TO ALL WHOM IT MAY CONCERN I Be it known that I, N. H. LINDLEY, ofBridgeport, in the county of Fairfield, and State of Connecticut, haveinvented a new and improved Propagating-Tank and Bed; and that thefollowing description, taken in connection with the accompanyingdrawings, hereinafter referred to, forms a full and exact specificationof the same, wherein I have set forth the nature and principles of mysaid improvements, by which my invention may be distinguished from allothers of a similar class, together with such parts as I claim, anddesire to have secured to me by Letters Patent.

This invention relates to a new and improved application of heated waterto propagating-tanks and beds in propagating-houses, and has for itsobject the heating of the bed to a proper or required temperature, andat the same time keeping the temperature of the house sufliciently highto avoid the condensation of vapor, and a consequent damp atmospherewithin-the house.

The great difliculty' hithertoexperienced injpropagating plants bybottom heat, has been the keeping of the bed, and the house'in which itis placed, at a proper temperature with one and the same heatingapparatus, the house, if kept at a proper temperature in cold weather,causing the bed to be unduly heated, and if the latter be kept at aproper temperature, the house being too cold, or of sufliciently lowtemperature to admit of the vapor condensing, and causing the atmosphereto be damp and unfavorable to the healthy development and growth of. thesurrounding plants. In order to avoid this difliculty two differentheating. apparatus'eshave,in some instances, been used, but this plan isattended with great expense and considerable trouble.

By my improvement I can keep both the propagating-bed and the house at aproper temperature with one and the same heating apparatus, which may bevery economically constructed. In thc'accompanying sheet of drawings-Figure 1 is a plan ortop view of, my invention, partly in section.

Figure 2, a longitudinal vertical section of the same taken in the linea; :v, fig. 1.

Figure 3, a transverse verticalsectiou of the same taken in the lineyvy, fig. 1.

Figure 4, a transverse vertical section of the same taken in the line 2z, fig. 1.

Similar letters of reference indicate like parts.

A represents an oblong box, which may be constructed of slate, or othermaterial, so as to be perfectly water-tight, and of any suitable lengthand width, according to the dimensions of propagating-bed required. In'this box therev is placed a horizontal slate partition, B, upon whichthe. earth or sand a, which forms the propagating-bed, is placed, asshown clearly in figs, 2 and ,4. The propagating bed does not extend thewhole width of the box A, an upright partition, I), being placed on thepartition B, so as to leave an open space, a at one side of the bed, thewhole length of the same, and over which there is an inclined plate ordeflector, c, the use of which will be presently shown. Underneath thepartition 13, within thelowercompa'rtment of the box A, there are placedthree longitudinal partitions, cZ (Z cl, and a transverse partition,--e,all of which are shown clearly in fig. 1. The longitudinal'partitions (Z(Z and the transverse partition 0 are near the sides and end of the box,and form a water-channel, 0, all around it, while the centrallongitudinal partition 01' forms a return-water passage or channel, D,underneath the central portion of the bed a. In one end of the box A,opposite to the end where the transverse partition is placed, there aremade two openings, ff,fbeing the induction opening, through which thehot water is admitted into the lower part of the box, nndf the openingthrough which it is discharged, said holes communicating, by means ofpipes, with a boiler, by which a constant circulation is kept up throughthe water-passages in the lower part of A. In the box A there are placedtwo valves, E E, in such a relative position with the openings ff, that,by adjusting said valves, the hot water maybe cut oil' from the passageor channel 0,; which-extends all around the edge of the bed, and made topass only through the passage or channel D, or made to pass through thechannel or passage 0 and be cut oif from D, or made to pass throughboth, as may lie-required.

By this simple means it willbe seen that when the bed ar'req'uircsbottom heat, and the temperature of the house is suificiently high, thehot water is allowed to circulate through the channel D only, and whenthe temperature of the house is toolow, the hot water is allowed to flowthrough the channel 0, and more or less through D, as may be required,the open space a and the deflector c causing a warm current of air topass over the surface of the bed into the house to carry oif ell vapor,and prevent the condensation of the same. The hot water in the channel Gthrows heat into the house without appreciably heating the bed, andhence both the bed and the house, by regulating the flow of water in thechannels, as specified, mdy always be kept at the proper temperature. 7

This device may be very economically put up, as water pipes, which arevery expensive, are avoided. The deflector c prevents the drip from theroof passing into the space a and therefore performs a. double function.

Having thus described my invention, I claim as new, and desire to secureby Letterslatent- The valves E E, .as described, and their adjustabiiityin combination with the hot-water channels C D, propagatingbeda.l1ot-air space a and deflector a, substantially as described for thepurposes specified.

N. II. LINDLEY.

Witnesses:

Amos FULLER, WM. B. NIeHoLs.

